Generates HTML documentation from well formatted comments.

Part of the JDK.

Documentation: http://docs.oracle.com/javase/7/docs/technotes/tools/solaris/javadoc.html

Sample usage:

javadoc -d _doc/ A.java B.java

Then view the generated index file _doc/index.html.

Private members are not shown by default on the docs, you can enable them with -private.

Package documentation can be done with a package-info.java file: http://stackoverflow.com/questions/624422/how-do-i-document-packages-in-java